Eurotech ZEUS Manual de usuario descargar pdf (Pagina 58)

Arcom Embedded Linux Technical Manual RedBoot

These parameters are explained in the following table:

Parameter Action

-r

Loads a raw image. The default is to load an SREC format image.

-m <method>

Specifies the transfer method. This can be http, tftp, file,

xmodem or ymodem.

-h <host>

Specifies the TFTP or HTTP server address, if you are using one

of these methods. The server address given to the ip_address

command, the address supplied by the BOOTP server or the

server address in the Flash configuration block is used (in that

order).

-b <base address>

Specifies the address to load the image to. This option is required

when you use the –r (raw image) option.

The name of the file to load, if you are loading via TFTP or HTTP

or from a file on a JFFS2 file system.

In almost every situation you can use the –r and –b parameters to load a raw image to

a specific address. The exception to this is when loading an ELF formatted file, as these

already contain details of their load address. Loading an SREC format image is beyond

the scope of this manual and is described in the eCos Reference Manual.

For example, the following command loads the raw file application.img from the default

TFTP server to address 0x200000:

RedBoot> load -r -b 0x200000 -m tftp application.img

The following loads an ELF image to the correct address:

RedBoot> load –m tftp redboot-ram.elf

Download via serial connection

Images are downloaded over the serial line using the X- or Y-modem protocols. You can

initiate a transfer by entering the following command:

RedBoot> load –r –b %{FREEMEMLO} –m ymodem

Once you have done this, you must start a Y-modem upload from within your serial

terminal emulation program. Under minicom, this is done by pressing Ctrl-A followed by

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Eurotech ZEUS Manual de usuario Pagina 58